<?php
/**
 * Imagick图片处理类
 *
 * 调用方法
    include_once('Imagick.class.php');
    $image= new lib_image_imagick();
    $image->open('data/test.gif');//调用图片
    $image->resize_to(100,100,'scale');//改变大小
    $image->add_text('shuyeer.com', 10, 20);//添加文字水印
    //$image->add_watermark('test.jpg', 10, 50);//添加图片水印
    $image->save_to('example_small.gif');//保存到指定路径
    $im->output();//输出
 *
 * @Author: yuanji <fenglangyj@139.com>
 * @DateTime: 12-11-3 下午1:44
 * @Copyright (c) 2012 http://www.magentoui.com All rights reserved.
 * @version  $Id: sss.php,v 1.3 uw Exp $
 * @Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
 */
      
      
    class lib_image_imagick  
    {  
        public $image = null;  
        public $type = null;  
      
        // 构造函数  
        public function __construct(){}  
      
      
        // 析构函数  
        public function __destruct()  
        {  
            if($this->image!==null) $this->image->destroy();   
        }  
      
        // 载入图像  
        public function open($path)  
        {  
            $this->image = new Imagick( $path );
            if($this->image)
            {  
                $this->type = strtolower($this->image->getImageFormat());  
            }  
            return $this->image;
        }  
          
      
        public function crop($x=0, $y=0, $width=null, $height=null)  
        {  
            if($width==null) $width = $this->image->getImageWidth()-$x;  
            if($height==null) $height = $this->image->getImageHeight()-$y;  
            if($width<=0 || $height<=0) return;  
              
            if($this->type=='gif')  
            {  
                $image = $this->image;  
                $canvas = new Imagick();  
                  
                $images = $image->coalesceImages();  
                foreach($images as $frame){  
                    $img = new Imagick();  
                    $img->readImageBlob($frame);  
                    $img->cropImage($width, $height, $x, $y);  
      
                    $canvas->addImage( $img );  
                    $canvas->setImageDelay( $img->getImageDelay() );  
                    $canvas->setImagePage($width, $height, 0, 0);  
                }  
                  
                $image->destroy();  
                $this->image = $canvas;  
            }  
            else  
            {  
                $this->image->cropImage($width, $height, $x, $y);  
            }  
        }  
      
        /* 
        * 更改图像大小 
        $fit: 适应大小方式 
        'force': 把图片强制变形成 $width X $height 大小 
        'scale': 按比例在安全框 $width X $height 内缩放图片, 输出缩放后图像大小 不完全等于 $width X $height 
        'scale_fill': 按比例在安全框 $width X $height 内缩放图片，安全框内没有像素的地方填充色, 使用此参数时可设置背景填充色 $bg_color = array(255,255,255)(红,绿,蓝, 透明度) 透明度(0不透明-127完全透明)) 
        其它: 智能模能 缩放图像并载取图像的中间部分 $width X $height 像素大小 
        $fit = 'force','scale','scale_fill' 时： 输出完整图像 
        $fit = 图像方位值 时, 输出指定位置部分图像  
        字母与图像的对应关系如下: 
         
        north_west   north   north_east 
         
        west         center        east 
         
        south_west   south   south_east 
         
        */  
        public function resize_to($width = 100, $height = 100, $fit = 'center', $fill_color = array(255,255,255,0) )  
        {  
              
            switch($fit)  
            {  
                case 'force':  
                    if($this->type=='gif')  
                    {  
                        $image = $this->image;  
                        $canvas = new Imagick();  
                          
                        $images = $image->coalesceImages();  
                        foreach($images as $frame){  
                            $img = new Imagick();  
                            $img->readImageBlob($frame);  
                            $img->thumbnailImage( $width, $height, false );  
      
                            $canvas->addImage( $img );  
                            $canvas->setImageDelay( $img->getImageDelay() );  
                        }  
                        $image->destroy();  
                        $this->image = $canvas;  
                    }  
                    else  
                    {  
                        $this->image->thumbnailImage( $width, $height, false );  
                    }  
                    break;  
                case 'scale':  
                    if($this->type=='gif')  
                    {  
                        $image = $this->image;  
                        $images = $image->coalesceImages();  
                        $canvas = new Imagick();  
                        foreach($images as $frame){  
                            $img = new Imagick();  
                            $img->readImageBlob($frame);  
                            $img->thumbnailImage( $width, $height, true );  
      
                            $canvas->addImage( $img );  
                            $canvas->setImageDelay( $img->getImageDelay() );  
                        }  
                        $image->destroy();  
                        $this->image = $canvas;  
                    }  
                    else  
                    {  
                        $this->image->thumbnailImage( $width, $height, true );  
                    }  
                    break;  
                case 'scale_fill':  
                    $size = $this->image->getImagePage();   
                    $src_width = $size['width'];  
                    $src_height = $size['height'];  
                      
                    $x = 0;  
                    $y = 0;  
                      
                    $dst_width = $width;  
                    $dst_height = $height;  
      
                    if($src_width*$height > $src_height*$width)  
                    {  
                        $dst_height = intval($width*$src_height/$src_width);  
                        $y = intval( ($height-$dst_height)/2 );  
                    }  
                    else  
                    {  
                        $dst_width = intval($height*$src_width/$src_height);  
                        $x = intval( ($width-$dst_width)/2 );  
                    }  
      
                    $image = $this->image;  
                    $canvas = new Imagick();  
                      
                    $color = 'rgba('.$fill_color[0].','.$fill_color[1].','.$fill_color[2].','.$fill_color[3].')';  
                    if($this->type=='gif')  
                    {  
                        $images = $image->coalesceImages();  
                        foreach($images as $frame)  
                        {  
                            $frame->thumbnailImage( $width, $height, true );  
      
                            $draw = new ImagickDraw();  
                            $draw->composite($frame->getImageCompose(), $x, $y, $dst_width, $dst_height, $frame);  
      
                            $img = new Imagick();  
                            $img->newImage($width, $height, $color, 'gif');  
                            $img->drawImage($draw);  
      
                            $canvas->addImage( $img );  
                            $canvas->setImageDelay( $img->getImageDelay() );  
                            $canvas->setImagePage($width, $height, 0, 0);  
                        }  
                    }  
                    else  
                    {  
                        $image->thumbnailImage( $width, $height, true );  
                          
                        $draw = new ImagickDraw();  
                        $draw->composite($image->getImageCompose(), $x, $y, $dst_width, $dst_height, $image);  
                          
                        $canvas->newImage($width, $height, $color, $this->get_type() );  
                        $canvas->drawImage($draw);  
                        $canvas->setImagePage($width, $height, 0, 0);  
                    }  
                    $image->destroy();  
                    $this->image = $canvas;  
                    break;  
                default:  
                    $size = $this->image->getImagePage();   
                    $src_width = $size['width'];  
                    $src_height = $size['height'];  
                      
                    $crop_x = 0;  
                    $crop_y = 0;  
                      
                    $crop_w = $src_width;  
                    $crop_h = $src_height;  
                      
                    if($src_width*$height > $src_height*$width)  
                    {  
                        $crop_w = intval($src_height*$width/$height);  
                    }  
                    else  
                    {  
                        $crop_h = intval($src_width*$height/$width);  
                    }  
                      
                    switch($fit)  
                    {  
                        case 'north_west':  
                            $crop_x = 0;  
                            $crop_y = 0;  
                            break;  
                        case 'north':  
                            $crop_x = intval( ($src_width-$crop_w)/2 );  
                            $crop_y = 0;  
                            break;  
                        case 'north_east':  
                            $crop_x = $src_width-$crop_w;  
                            $crop_y = 0;  
                            break;  
                        case 'west':  
                            $crop_x = 0;  
                            $crop_y = intval( ($src_height-$crop_h)/2 );  
                            break;  
                        case 'center':  
                            $crop_x = intval( ($src_width-$crop_w)/2 );  
                            $crop_y = intval( ($src_height-$crop_h)/2 );  
                            break;  
                        case 'east':  
                            $crop_x = $src_width-$crop_w;  
                            $crop_y = intval( ($src_height-$crop_h)/2 );  
                            break;  
                        case 'south_west':  
                            $crop_x = 0;  
                            $crop_y = $src_height-$crop_h;  
                            break;  
                        case 'south':  
                            $crop_x = intval( ($src_width-$crop_w)/2 );  
                            $crop_y = $src_height-$crop_h;  
                            break;  
                        case 'south_east':  
                            $crop_x = $src_width-$crop_w;  
                            $crop_y = $src_height-$crop_h;  
                            break;  
                        default:  
                            $crop_x = intval( ($src_width-$crop_w)/2 );  
                            $crop_y = intval( ($src_height-$crop_h)/2 );  
                    }  
                      
                    $image = $this->image;  
                    $canvas = new Imagick();  
                      
                    if($this->type=='gif')  
                    {  
                        $images = $image->coalesceImages();  
                        foreach($images as $frame){  
                            $img = new Imagick();  
                            $img->readImageBlob($frame);  
                            $img->cropImage($crop_w, $crop_h, $crop_x, $crop_y);  
                            $img->thumbnailImage( $width, $height, true );  
                              
                            $canvas->addImage( $img );  
                            $canvas->setImageDelay( $img->getImageDelay() );  
                            $canvas->setImagePage($width, $height, 0, 0);  
                        }  
                    }  
                    else  
                    {  
                        $image->cropImage($crop_w, $crop_h, $crop_x, $crop_y);  
                        $image->thumbnailImage( $width, $height, true );  
                        $canvas->addImage( $image );  
                        $canvas->setImagePage($width, $height, 0, 0);  
                    }  
                    $image->destroy();  
                    $this->image = $canvas;  
            }  
              
        }  
          
      
          
      
        // 添加水印图片  
        public function add_watermark($path, $x = 0, $y = 0)  
        {  
            $watermark = new Imagick($path);  
            $draw = new ImagickDraw();  
            $draw->composite($watermark->getImageCompose(), $x, $y, $watermark->getImageWidth(), $watermark->getimageheight(), $watermark);  
      
            if($this->type=='gif')  
            {  
                $image = $this->image;  
                $canvas = new Imagick();  
                $images = $image->coalesceImages();  
                foreach($image as $frame)  
                {  
                    $img = new Imagick();  
                    $img->readImageBlob($frame);  
                    $img->drawImage($draw);  
                      
                    $canvas->addImage( $img );  
                    $canvas->setImageDelay( $img->getImageDelay() );  
                }  
                $image->destroy();  
                $this->image = $canvas;  
            }  
            else  
            {  
                $this->image->drawImage($draw);  
            }  
        }  
      
          
        // 添加水印文字  
        public function add_text($text, $x = 0 , $y = 0, $angle=0, $style=array())  
        {  
            $draw = new ImagickDraw();  
            if(isset($style['font'])) $draw->setFont($style['font']);  
            if(isset($style['font_size'])) $draw->setFontSize($style['font_size']);  
            if(isset($style['fill_color'])) $draw->setFillColor($style['fill_color']);  
            if(isset($style['under_color'])) $draw->setTextUnderColor($style['under_color']);  
              
            if($this->type=='gif')  
            {  
                foreach($this->image as $frame)  
                {  
                    $frame->annotateImage($draw, $x, $y, $angle, $text);  
                }  
            }  
            else  
            {  
                $this->image->annotateImage($draw, $x, $y, $angle, $text);  
            }  
        }  
          
          
        // 保存到指定路径  
        public function save_to( $path )  
        {  
            if($this->type=='gif')
            {  
                $this->image->writeImages($path, true);  
            }  
            else  
            {  
                $this->image->writeImage($path);  
            }  
        }  
        // 输出图像
        public function output($header = true){
            if($header) header('Content-type: image/'.$this->type);
            echo $this->image->getImagesBlob();
        }  
      
          
        public function get_width()  
        {  
            $size = $this->image->getImagePage();   
            return $size['width'];  
        }  
          
        public function get_height()  
        {  
            $size = $this->image->getImagePage();   
            return $size['height'];  
        }  
      
        // 设置图像类型， 默认与源类型一致  
        public function set_type( $type='png' )  
        {  
            $this->type = $type;  
            $this->image->setImageFormat( $type );  
        }  
      
        // 获取源图像类型  
        public function get_type()  
        {  
            return $this->type;  
        }  
      
      
        // 当前对象是否为图片  
        public function is_image()  
        {  
            if( $this->image )  
                return true;  
            else  
                return false;  
        }  
          
      
      
        public function thumbnail($width = 100, $height = 100, $fit = true){ $this->image->thumbnailImage( $width, $height, $fit );} // 生成缩略图 $fit为真时将保持比例并在安全框 $width X $height 内生成缩略图片  
      
        /* 
        添加一个边框 
        $width: 左右边框宽度 
        $height: 上下边框宽度 
        $color: 颜色: RGB 颜色 'rgb(255,0,0)' 或 16进制颜色 '#FF0000' 或颜色单词 'white'/'red'... 
        */  
        public function border($width, $height, $color='rgb(220, 220, 220)')  
        {  
            $color=new ImagickPixel();  
            $color->setColor($color);  
            $this->image->borderImage($color, $width, $height);  

        }  
          
        public function blur($radius, $sigma){$this->image->blurImage($radius, $sigma);} // 模糊  
        public function gaussian_blur($radius, $sigma){$this->image->gaussianBlurImage($radius, $sigma);} // 高斯模糊  
        public function motion_blur($radius, $sigma, $angle){$this->image->motionBlurImage($radius, $sigma, $angle);} // 运动模糊  
        public function radial_blur($radius){$this->image->radialBlurImage($radius);} // 径向模糊  
      
        public function add_noise($type=null){$this->image->addNoiseImage($type==null?imagick::NOISE_IMPULSE:$type);} // 添加噪点  
          
        public function level($black_point, $gamma, $white_point){$this->image->levelImage($black_point, $gamma, $white_point);} // 调整色阶  
        public function modulate($brightness, $saturation, $hue){$this->image->modulateImage($brightness, $saturation, $hue);} // 调整亮度、饱和度、色调  
      
        public function charcoal($radius, $sigma){$this->image->charcoalImage($radius, $sigma);} // 素描  
        public function oil_paint($radius){$this->image->oilPaintImage($radius);} // 油画效果  
          
        public function flop(){$this->image->flopImage();} // 水平翻转  
        public function flip(){$this->image->flipImage();} // 垂直翻转  
      
    }